Polyurethane (meth)acrylates and processes for preparing same
CA 2082575 A1 · Owner: Union Carbide Chemicals & Plastics Technology Corporation · Inventors: Koleske, Joseph V.; Bassett, David R.; Argyropoulos, John N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, This invention relates to polyurethane (meth)acrylates that are prepared from certain liquid hydrocarbon diols and/or derivatives of said liquid hydrocarbon diols, polyfunctional isocyanates and, hydroxyalkyl acrylates and methacrylates. The polyurethane (meth)acrylates are useful as decorative and functional coatings, inks, adhesives sealants, and formed parts. D-16844
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.